速进问：_____________________ 答:Since I was three.问句中是 When did you start playing tennis?还是How long have you played tennis?

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速进问：_____________________答:SinceIwasthree.问句中是Whendidyoustartplayingtennis?还是Howlonghaveyouplayedten

速进问：_____________________ 答:Since I was three.问句中是 When did you start playing tennis?还是How long have you played tennis?
速进
问：_____________________
答:Since I was three.
问句中是 When did you start playing tennis?还是How long have you played tennis?

速进问：_____________________ 答:Since I was three.问句中是 When did you start playing tennis?还是How long have you played tennis?
How long have you played tennis?
因为回答Since I was three是专门回答完成时态的
而When did you start playing tennis?
回答应该用过去时态

How long have you played tennis? 对的
因为答句有since，表明要用完成时

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